cliché question, but hey why not?
Debian, because I know they won’t pull a redhat ever. They do things the right way for things that matter.
Been on Ubuntu since forever but I’m seriously considering debian. What, in your view, would be the biggest advantages (or disadvantages, if any) for debian over ubuntu?
Drivers and kernel modules. Debian with “proprietary drivers enabled” works on about as much stuff as Ubuntu without proprietary drivers enabled. I’ve never got it working without issues on a laptop. You’ll definitely be avoiding drivers that probably have government backdoors if you’re using Debian but it comes at a price.
Arch is ironically easier to deal with in this regard. To give credit where credit is due, Debian is very stable. Once you install it on a sever, it won’t break on its own. It may be harder to get all your hardware working but once you do, if you never upgrade you’ll never have to mess with it again.